```html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>OpenSpot - 开源音乐流媒体应用</title>
    <link href="https://cdn.staticfile.org/font-awesome/6.4.0/css/all.min.css" rel="stylesheet">
    <link href="https://cdn.staticfile.org/tailwindcss/2.2.19/tailwind.min.css" rel="stylesheet">
    <link href="https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/mermaid@latest/dist/mermaid.min.js"></script>
    <style>
        body {
            font-family: 'Noto Sans SC', Tahoma, Arial, Roboto, "Droid Sans", "Helvetica Neue", "Droid Sans Fallback", "Heiti SC", "Hiragino Sans GB", Simsun, sans-serif;
            color: #333;
            line-height: 1.6;
        }
        h1, h2, h3, h4 {
            font-family: 'Noto Serif SC', serif;
            font-weight: 600;
        }
        .hero-gradient {
            background: linear-gradient(135deg, #6e45e2 0%, #88d3ce 100%);
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }
        .play-btn {
            transition: all 0.3s ease;
        }
        .play-btn:hover {
            transform: scale(1.1);
            box-shadow: 0 0 20px rgba(110, 69, 226, 0.5);
        }
        .drop-cap::first-letter {
            float: left;
            font-size: 4em;
            line-height: 0.65;
            margin: 0.1em 0.1em 0.1em 0;
            color: #6e45e2;
        }
    </style>
</head>
<body class="antialiased">
    <!-- Hero Section -->
    <section class="hero-gradient text-white min-h-screen flex items-center justify-center py-20 px-4">
        <div class="container mx-auto max-w-6xl px-6">
            <div class="flex flex-col md:flex-row items-center">
                <div class="md:w-1/2 mb-12 md:mb-0">
                    <h1 class="text-5xl md:text-6xl font-bold mb-6 leading-tight">OpenSpot</h1>
                    <p class="text-xl md:text-2xl mb-8 font-light opacity-90">开源音乐流媒体应用 — 纯粹的音乐体验</p>
                    <p class="text-lg mb-10 opacity-80 leading-relaxed">高保真音质 · 无广告干扰 · 无需登录 · 跨平台支持</p>
                    <div class="flex flex-wrap gap-4">
                        <a href="#features" class="px-8 py-3 bg-white text-purple-800 rounded-full font-semibold hover:bg-opacity-90 transition duration-300">
                            核心功能 <i class="fas fa-arrow-down ml-2"></i>
                        </a>
                        <a href="https://github.com/BlackHatDevX/openspot-music-app" target="_blank" class="px-8 py-3 border-2 border-white text-white rounded-full font-semibold hover:bg-white hover:bg-opacity-10 transition duration-300">
                            <i class="fab fa-github mr-2"></i> GitHub代码
                        </a>
                    </div>
                </div>
                <div class="md:w-1/2 flex justify-center">
                    <div class="relative max-w-md">
                        <img src="https://cdn.nlark.com/yuque/0/2025/png/21449790/1753276696847-d73c51b1-33f5-48af-b25e-8c9b64007adf.png" 
                             alt="OpenSpot应用界面" 
                             class="rounded-xl shadow-2xl border-8 border-white border-opacity-20">
                        <button class="play-btn absolute top-1/2 left-1/2 transform -translate-x-1/2 -translate-y-1/2 w-16 h-16 bg-white bg-opacity-90 rounded-full flex items-center justify-center">
                            <i class="fas fa-play text-purple-800 text-xl"></i>
                        </button>
                    </div>
                </div>
            </div>
        </div>
    </section>

    <!-- Problem Statement -->
    <section class="py-20 bg-gray-50">
        <div class="container mx-auto max-w-4xl px-6">
            <div class="text-center mb-16">
                <h2 class="text-3xl md:text-4xl font-bold mb-4">它能解决什么问题</h2>
                <div class="w-24 h-1 bg-purple-600 mx-auto"></div>
            </div>
            <div class="bg-white rounded-xl shadow-lg p-8 md:p-12">
                <p class="drop-cap text-lg leading-relaxed">
                    音乐流媒体服务常有广告干扰、需要登录或付费订阅，限制用户体验。离线下载和跨设备同步也常受限，影响便携性。OpenSpot就是为解决这些问题而生，提供免费、无登录的音乐流媒体和下载功能，让音乐回归纯粹本质。
                </p>
            </div>
        </div>
    </section>

    <!-- Features Section -->
    <section id="features" class="py-20">
        <div class="container mx-auto max-w-6xl px-6">
            <div class="text-center mb-16">
                <h2 class="text-3xl md:text-4xl font-bold mb-4">核心功能概述</h2>
                <